SkPngDecoder Namespace Reference

Functions
SK_API bool	IsPng (const void *, size_t)
SK_API std::unique_ptr< SkCodec >	Decode (std::unique_ptr< SkStream >, SkCodec::Result *, SkCodecs::DecodeContext=nullptr)
SK_API std::unique_ptr< SkCodec >	Decode (sk_sp< SkData >, SkCodec::Result *, SkCodecs::DecodeContext=nullptr)
constexpr SkCodecs::Decoder	Decoder ()

Function Documentation

Decode() [1/2]

std::unique_ptr< SkCodec > SkPngDecoder::Decode	(	sk_sp< SkData >	data,
		SkCodec::Result *	outResult,
		SkCodecs::DecodeContext	ctx = nullptr
	)

Definition at line 1252 of file SkPngCodec.cpp.

                                                           {
    if (!data) {
        if (outResult) {
            *outResult = SkCodec::kInvalidInput;
        }
        return nullptr;
    }
    return Decode(SkMemoryStream::Make(std::move(data)), outResult, ctx);
}

Decode() [2/2]

std::unique_ptr< SkCodec > SkPngDecoder::Decode	(	std::unique_ptr< SkStream >	stream,
		SkCodec::Result *	outResult,
		SkCodecs::DecodeContext	ctx = nullptr
	)

Attempts to decode the given bytes as a PNG.

If the bytes are not a PNG, returns nullptr.

DecodeContext, if non-null, is expected to be a SkPngChunkReader*

Definition at line 1238 of file SkPngCodec.cpp.

                                                           {
    SkCodec::Result resultStorage;
    if (!outResult) {
        outResult = &resultStorage;
    }
    SkPngChunkReader* chunkReader = nullptr;
    if (ctx) {
        chunkReader = static_cast<SkPngChunkReader*>(ctx);
    }
    return SkPngCodec::MakeFromStream(std::move(stream), outResult, chunkReader);
}

Decoder()

constexpr SkCodecs::Decoder SkPngDecoder::Decoder ( )

inlineconstexpr

Definition at line 38 of file SkPngDecoder.h.

                                           {
    return { "png", IsPng, Decode };
}

IsPng()

bool SkPngDecoder::IsPng	(	const void *	data,
		size_t	len
	)

Returns true if this data claims to be a PNG image.

Definition at line 1234 of file SkPngCodec.cpp.

                                         {
    return SkPngCodec::IsPng(data, len);
}